Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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A 5GHz-Band Low Noise Amplifier Using Depletion-type SOI MOSFET

공핍형 SOI MOSFET를 이용한 5GHz대역 저잡음증폭기

  • 김규철 (목포대학교 해양전자통신공학부)
  • Published : 2009.10.31
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Abstract

A 5-GHz band Low Noise Amplifier(LNA) using SOI MOSFET is designed. To improve the noise performance, depletion-type SOI MOSFET is adopted, and it is designed by the two-stage topology consisting of common-source and common-gate stages for low-voltage operation. The fabricated LNA achieved an S11 of less than -10dB, voltage gain of 21dB with a power consumption of 8.3mW at 5.5GHz, and a noise figure of 1.7dB indicated that the depletion-type LNA improved the noise figure by 0.3dB compared with conventional type. These results show the feasibility of a CMOS LNA employing depletion-type SOI MOSFET for low-noise application.

SOI MOSFET를 이용하여 5GHz대역 저잡음 증폭기를 설계하였다. 잡음특성을 향상시키기 위해 공핍형 SOI-MOSFET를 사용하였고, 저전압에서 동작시키기 위해 소스접지와 게이트접지 증폭기를 연결한 2단형으로 설계 하였다. 제작된 LNA는 5.5GHz에서 이득이 21dB, S11이 -10dB이하, 소비전력 8.3mW의 결과를 얻었으며 잡음지수는 공핍형 저잡음 증폭기가 1.7dB로 일반형보다 0.3dB 개선된 결과를 얻을 수 있었다. 이 같은 결과로 공핍형 SOI MOSFET를 사용함으로써 보다 잡음특성이 우수한 CMOS LNA를 설계 할 수 있음을 확인하였다.

Keywords

References

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